Grip-thread for vehicle-tires.



J. M. MACK.

GRIP TRBAD FOR VEHICLB TIBES.

APPLIGATION FILED Nov. 18. 1908.

1,128,840. Patented Feb.16,1915.

J. M. MAGK. GRIP TRBAD Fon VBHIGLB TIRBS.

AAAAAAAAAAAA ILED N0v;18, 1908.

1, 1 28,340. Patentea Feb. 16, 1915.,

ATTORNEYS .t i i JOHN M. M'ACK, OF ALLENTOWN, PENNSYLVANIA, ASSIGNOR T0 INTERNATIONAL MOTOR COMPANY, OF WILMINGTON, DELAWARE, CORPORATION OF DELAWARE.

GRIP-TREAD FOR VEHICLE-TIRES.

Speciflcaton of Letters Patent.

Patented Feb. 16, 1915..

Application filed November 18, 1908. Serial No. 463,260.

`Al1entown, Lehigh county, in the State of Pennsylvania, have invented certain new and useful Improvements in Grip-Treads for Vehicle-Tires, of which the following is a full, clear, and exact specification.

My invention relates to improvements 111 means for preventing the skidding or slipping of vehicle wheels, and for increasing the tractive power thereof, and the same has for its object more particularly to provide a simple, efficient and reliable device which may be readily attached to or removed from the wheel.

Further, said invention has for its object to provide a device which is more particularlv adapted for use in connection with heavy commercial Vehicles provided with tires of the twin type variety.

To the attainment of the aforesaid objects and ends, my invention consists in the novel details of construction, and in the combination, connection and arrangement of parts hereinafter more fully described, and then pointed out in the claims.

In the accompanying drawings forming part of this specification, wherein like nu- Vmerals of reference indicate like parts, Figure l is a transverse section taken on the line 1-1 of Fig. 2, showing a form of vehicle wheelprovided with twin tires, and one form of grip tread constructed according to and embodying my invention applled thereto; Fig. 2 is a longitudinal section of the same taken on the line 2-2 of Fig. 1; Fig. 3 is a detail side view showing a portion of a vehicle wheel and'tire with my invention applied thereto; Fig. 4 is a detail perspective view showing the clamping device for securing the device in position upon a vehicle wheel; Fig. 5 is a longitudina-l sectional view showing the clamping means with the parts fitted together; Fig. 6 is a transverse sectional view showing a modified form of securing or attaching means; Fig. 7 is 'a bottom view of the securing or attaching means detached from a wheel rim, and Fig. 8 is a longitudinal section taken on the line 8-8 of Fig. 7.

In said drawings 10 designates a vehicle twheel. ,c'omprising a wooden felly '11 and spokes 12;,of lusual construction. Upon the outer side of the'felly 11 is secured' an annular metal plate 13 and along the opposite edges of said felly 11 are secured annular fianges 14, 14 having their edges projecting beyond the opposite edges of saidannular plate 13.v

15, 15 denote solid rubber tire portions which aremaintained in position upon the annular plate 13 and a gai'nst'the inner sides of the annular flanges let 14: by means of an intermediate annular member 16 and a ring 17. Midway 4between the spokes 12 12 are arranged bolts 18 18 which extend inwardly through the felly 11 and the annular t plate 13 and have their heads 19 19 disposed in countersunk recesses provided upon the outer surfaceof the annular plate 13. Tlie inner end of said bolts extend above the inner edge of the felly and upon said inner projecting ends of said bolts 18 18 are disposed plates20, 21 provided at their outer edges With eyes 22 22. Both of' said plates. i

are provided with centrally located aper-v tures 23 23`to receive the projecting end of the bolt 18. The lower of -said plates is provided at thel end opposite to the eyes 22 224 with a series of longitudinal ribs or projections 24 24 which 'extend upwardly from the upper surface of said plate, while the underside of the upper plate 21 is partly 'cut away an'd provided with a series of depressed longitudinal ,grooves 25 25' which register with the 'projections 2124 on the lower plate 20 when said plates are adjusted in position one upon the other' andv upon the bolt 18. 2G denotes a nut'disposed upon the threaded projecting end of the bolt 18 where-by to secure said plates 20 and 21 rigidly in` position upon the felly of`the wheel with the eyes 22 22 thereon arranged adjacent to the opposite edges. of the felly, and 27 27 denote transverse lgripping members or chains each securedatone end toone of the eyes 22 22 of the ,plate 20 and its other end' extending overr' and bearing against the tires 15 15 and secured 'within one of the eyes 22 22 'of the plate 23.

It will of course be understood that in'v actual use the wheel is' tobe provided between each of its spokes' with'one or lmore bolts 18 18 as the dimensions ofl the wheel require, and lclan'iping plates 20, 21 having chain portions 27 27 secured Vthereto, so that .about equally distanced' from each other, and

secured'in position upon the inner surface I 37 of the plates 35 and 36 the chains of the adjoining clamping device or Sections at either side thereof.

The construction above described is particularly7 designed for use in connection With Wheels intended to be provided With antiskidding devices constructed according to this invention, and, at Figs. G, 7, and 8 I have shown a modification which is intended to be applied to vehicle Wheels without in any way changing the 'construction thereof, or necessitating the removal of the tires and securing members therefor from the Wheel. In the construction as illustrated vat said figures the clamping device comprises a transverse plate 30 adapted to be of the felly 31 by means of screws 32 32 and intermediate said screws 32 32 'said transverse plate 30 is provided With a short inwardly projeeting threaded stud or bolt 33 having a reduced threaded portion or end 34-. 36 denote clampingl devices each provided at its outer projeeting ends with, a. pair of eyes 37 37. The lower of said plates 36 has its underside cut away or recessed at its inner end so that the underside of its outer projecting portion shallrest directly upon the inner surface of the felly, and the unclerside of its inner recessed portion rest directly upon the ,transverse plate 30, and upon the upper surface of said lower plate 31 is provided a. series of projecting ribs or corrugations 38 38. The upper clamping plate 36 is also recessed upon the underside of its corresponding end, butl-to a greater extent than the plate 35, so that its outer projecting portion shall rest upon the inner surface of the felly 31, while its inner portion which is provided With a series of longitudinal grooves or `recesses 39 39 shall register with the projections or corrugations 38 upon the upper surface ofthe lower plate When said plates are brought into position. The inner overlapping ends of the plates 35 and 36 are provided with registering apertures adapted to receive the threaded stud or bolt 33 of the transverse 'plate and be securedin position thereonby means 'of a nut 40 working upon the threaded end or ,portion 34 of said Stud or boss. 33, and' 41 41 denote Chains secured at their opposite ends to the eyes 37 the tire or tires of the wheel. a

Having thus. described my invention,

and embracing nieaeeo o what I claim and desire to secure by Letters Patent is: 1. An apparatus of the character olescribed, comprising a stud adapted for securement to a Wheel rim intermediate the spokes .thereof, a' plurality of flat attaching plates provided with registering openings adapted to' receive said stud, means for holding said plates against lateral movement relative to each other, gripping means secured. to said attaching plates, and means for securing said attachin plates together and to'said stud, substantially asspecified.

2. An apparatus of the Character described, eomprising a Vertical support adapted for securenaent 'to a Wheel rim intermediate the spokes thereof, a pairvof fiat attaching plates provided with registering apertures adapted to be engaged bysaid vertical support, one of said plates being provided upon its upper side With a series of parallel longitudinal ribs, and the other of said plates provided vupon its under ,side with a series of parallel longitudinal grooves adapted to receive the ribs on said firstnamed plate, gripping means secured to said attaching plates7 and means for securing said attaching plates together and in position upon said Vertical support, substantially as specified. v

3. An apparatus of the Character described, comprising a bolt adapted for securement to a vehicle Wheel, a plurality of flat attaching plates adapted to be engaged by said bolt, a series of longitudinal grooves provided in the end of one of said plates, a series of longitudinal projections provided upon the other of said plates and intermesh'- ing with the grooves of said first-named plate, eyes provided at the outer ends of said plates, a plurality of cliains secured at their ends to the eyes provided at the ends of said attaching plates, and a nut for securing said attaching plates together and in position upon said bo1t,' substantially as specified. I Signed at Allentown, in the county of Lehigh and State of Pennsylvania, this 14th day of November, nineteen hundred and eight.

.roi-IN M. Macie. 

